GB1041658A - Electron beam deflection circuit - Google Patents

Electron beam deflection circuit

Info

Publication number
GB1041658A
GB1041658A GB39170/64A GB3917064A GB1041658A GB 1041658 A GB1041658 A GB 1041658A GB 39170/64 A GB39170/64 A GB 39170/64A GB 3917064 A GB3917064 A GB 3917064A GB 1041658 A GB1041658 A GB 1041658A
Authority
GB
United Kingdom
Prior art keywords
deflection
voltage
terminal
diodes
divider
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB39170/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1041658A publication Critical patent/GB1041658A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements
    • H04N3/2335—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements with calculating means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
    • G09G1/04—Deflection circuits ; Constructional details not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Details Of Television Scanning (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

1,041,658. Cathode-ray tube circuits. WESTINGHOUSE ELECTRIC CORPORATION. Sept. 25, 1964 [Oct. 10, 1963], No. 39170/64. Heading H4T. In an arrangement for reducing pin-cushion distortion on the display afforded by a cathoderay tube (C.R.T.), correction networks 14, Fig. 4, are inserted between the deflexion signal sources 10, 12 and the associated deflection means 20, 22 and each correction network, Fig. 5, comprises at least one voltage controlled non-linear voltage divider, the divider ratio being controlled by deflection signal amplitude. For a given deflection direction, e.g. X, the uncorrected X-deflection voltage E x is applied at terminal 32, the uncorrected Y-deflection voltage E y is fed in at terminal 34 and the corrected X-deflection voltage appears at terminal 36. The biasing resistors for diodes 80, 82 ... 88 and 80<SP>1</SP>, 82<SP>1</SP> . . . 88<SP>1</SP> are respectively coupled to junctions 90 and 92 which control the diode conduction potentials. As E x increases above zero diode 80 conducts first followed by diodes 82, 84, 86 and 88 in that order thereby affecting the divider ratio of first voltage divider 40, 42 ... 48; as E x increases below zero, diodes 80<SP>1</SP>, 82<SP>1</SP> ... 88<SP>1</SP> operate similarly. The second voltage divider 41, 43 ... 49 is affected similarly by the E y input at terminal 34, and transistor 70 or 71 conducts to control the potential at junction 90 or 92. Details relating to the design of the network, including the correction factor equation, are given. The values of resistors 51, 53 ... 65 and 51<SP>1</SP>, 53<SP>1</SP> ... 65<SP>1</SP> may be found expeditiously by observing spot displacement at the C.R.T. screen; a television type raster or test pattern may be employed.
GB39170/64A 1963-10-10 1964-09-25 Electron beam deflection circuit Expired GB1041658A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US315303A US3309560A (en) 1963-10-10 1963-10-10 Linearity correction apparatus

Publications (1)

Publication Number Publication Date
GB1041658A true GB1041658A (en) 1966-09-07

Family

ID=23223797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39170/64A Expired GB1041658A (en) 1963-10-10 1964-09-25 Electron beam deflection circuit

Country Status (3)

Country Link
US (1) US3309560A (en)
DE (1) DE1439973A1 (en)
GB (1) GB1041658A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422306A (en) * 1965-05-21 1969-01-14 Sylvania Electric Prod Distortion correction circuitry
US3403289A (en) * 1966-02-18 1968-09-24 Ibm Distortion correction system for flying spot scanners
US3435278A (en) * 1966-06-30 1969-03-25 Ibm Pincushion corrected deflection system for flat faced cathode ray tube
US3447027A (en) * 1967-09-18 1969-05-27 Motorola Inc Pincushion correction circuit
US3512039A (en) * 1968-04-30 1970-05-12 Rca Corp Deflection corrector circuit for cathode ray tube
US3489946A (en) * 1968-06-03 1970-01-13 Sperry Rand Corp Major deflection circuitry for crt display
US3518481A (en) * 1968-06-21 1970-06-30 Texas Instruments Inc Cathode-ray tube linearity corrector
US3621326A (en) * 1968-09-30 1971-11-16 Itek Corp Transformation system
US3517252A (en) * 1969-02-20 1970-06-23 Sanders Associates Inc Linearity correction apparatus for magnetically deflected cathode ray tubes
US3619707A (en) * 1969-08-08 1971-11-09 Rca Corp Astigmatism correction for electron beam devices
US3702949A (en) * 1970-01-07 1972-11-14 Harris Intertype Corp Compensation systems for cathode ray tube display systems
US3763393A (en) * 1970-05-28 1973-10-02 Rca Corp Linearity correction circuit for a cathode ray tube
US3673323A (en) * 1970-09-23 1972-06-27 Hewlett Packard Co Storage display system
US3914651A (en) * 1970-09-24 1975-10-21 Clayton A Washburn Cathode, ray tube structures
US3852640A (en) * 1971-03-31 1974-12-03 Sanders Associates Inc Cathode ray tube circuit
US3867703A (en) * 1973-08-06 1975-02-18 American Optical Corp Sweep generator for linear cathode ray tube display
US4817038A (en) * 1977-12-21 1989-03-28 Siemens Gammasonics, Inc. Radiation signal processing system
NL8104947A (en) * 1981-11-02 1983-06-01 Philips Nv TELEVISION LINE DEFLECTION.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649555A (en) * 1951-09-04 1953-08-18 Rca Corp Television raster shape control system
US2842709A (en) * 1953-10-13 1958-07-08 Rca Corp Raster distortion correction
US2758248A (en) * 1955-02-21 1956-08-07 Gen Electric Anti-pincushion circuit
US2906919A (en) * 1955-12-27 1959-09-29 Gen Electric Deflection circuit
US2831145A (en) * 1956-12-31 1958-04-15 Ibm Anti-distortion means for cathode ray tube displays
US2954502A (en) * 1958-11-10 1960-09-27 Bell Telephone Labor Inc Deflection circuit for cathode ray tubes
US3205377A (en) * 1963-07-10 1965-09-07 Jr Lawrence A Nix Raster linearity correction generator

Also Published As

Publication number Publication date
US3309560A (en) 1967-03-14
DE1439973A1 (en) 1969-12-11

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